Improvement in machinery for sanding paper



UNITED STATES PATENT OFFICE.

JAMES P. GAGE, Ol NEW YORK, N. Y.

IMPROVEMENT IN MACHINERY FOR-SANDING PAPER.-

Specification forming part of Letters .Patent No. 5,443, dated February 15, 184S.

To all whom it may concern:

Beit known that I, JAMES P. GAGE-of New York, in the county of New York and State of New York, have invented a new Machine for the Manufacture ot' Sand-Paper; and I do hereby declare the following to be a full, clear, and exact description of the same, 'reference being had to the annexed drawings, making a part of this specication, in which- Figure l is a perspective view, and Figs. 2, 3, and 4 are sections and details.

The nature of my invention consists in machinery for applying and afixing to the surface of paper rough orangular pieces of glass, sand crushed rock, or other like materials, and securing the same ina permanent manner to'the said paper, which, when done, constitutes the article kn( Wn as sand-paper.

Upon a suitable frame a. a, I place my gluevat,`rollers, and glassing-table. The glue-vat h consists of an oblong box having an upright secured at each end. These uprights have slits cut through them from the top down to a point on a line'with the rim of the gluevat, or thereabout. A roller ,c is next placed within the vat so that its axis will be within the slits in the uprights and have their bearings upon the bottom of said slits, so that the lower side of the roller will be constantly immersed in the glue contained in the vat. This I call the sizing-rollen7 and it consists of a cylinder, of wood or other suitable material, covered on the outside with felted cloth. It has likewise two peculiar centers, as seen in Fig. 4. The pins of which they are constructed have conical rings turned upon them or washers of that shape. The use of these washers is to prevent the glue which wastes over the ends of the roller from spreading out upon the journals.

The roller (Z is the pressure-roller, and revolves upon the top of the sizing-roller c, and .is kept in its place by the slits in the u pri ghts.

In order to regulate the pressure ofthe roller d, a trough is placed above ithaving two legs, which pass down through the` slits before named and rest upon the top of its journals. Sufficient weight is next put into the trough to get the required pressure.

Regulating-springs may be substituted in the place of the trough.

The letter e represents a brush extending the length of the roller d, the use of which is to level the glue upon the paper and sweep o any excess that maybe upon it. A vibrating motion is to be given to it by cams placed upon the sides of the rollers with suitable connections.

Immediately beyond the rollers is the xsanding-box h and sieve g. The sieve consists of a shallow frame o f wood, well braced on the interior by iron rods or like material, havingh 'three forks at the back of the frame.

Opposite to the front' point of the brace, outside the frame, there is a piece of thick leather or other like material to protect the frame from being battered by the blows of the shot.

.The letter 7L represents a box placed beneath the sieve to catch the particles of sand as they waste over the edges of the paper.

On a iioor immediately above the first set of rollers is placed. a second set in every respect similar to the iirst, and is for the purpose of giving the iinishing sizing after the paper has received its sand. The paper,.how ever, before it receives the action of these second. rollers passes through a drying-room and is there dried. The putting of glue upon the paper a second time'by means of the uppermost set of rollers is for the purpose of giving additional adhesion to the particles of sand. After passing through these last' rollers the paper is again subjected to the drying process, and carried to the cutting-table to be divided into sheets or rolled up.

In the place ot'the sievea hopper is sometimes put, which delivers the sand .in a continuous stream upon the paper. This hopper consists of a long open trough with the sides converging at the bottormso as to'form a nar row slit, through which the` sand falls in a slender stream upon the paper as it passes along. A section of the trough is seen in Fig. 2.

for sanding, and accordingly passes under the.

sieve for the purpose. This delicate and iniportant part is performed by the attendant, Who, standing Yon the lforni beside the sieve and Watching the progress of the paper as it passes 'under it, strikes the side of the sieve with the suspended shot from time to time, which shock is conducted throughout the frame by the conductor, before described. The sand by this means falls in an equal shower over the glued surface, and that so nicely that no two particles rest upon the other, While` they at the same time present all possible angles to the surface. The sieve must be elevated above the paper at dierent heights for different numbers of sand. Thus, for large sizes the sand is to fall a considerable distance upon the glue, for by this means it is forced through the surface and more securely xed upon the paper. The paper after it is sanded passes into a drying-room of suicient extent to dry the glue before it arrives at the second yset of rollers. It is finished by receiving another coating of size from the upper set of rollers upon the sanded surface, which effectually secures all the particles. After leaving these rollers the paper is again subjected to the drying process, when it is carried to the cutting-table and prepared for the market, or, if not cut, rolled into large rolls.

That I claim as my invention and improvement, and desire to secure by Letters Patent,

The second setof rollers for giving the iinishing sizing, combined with the sanding table or hopper and the ir'st set of rollers, as described and set forth herein.

JAMES P. GAGE.

Witnesses:

J. P. PIRssON, J. L. KINGSLEY. 

